Suppose you want to check if an integer is inside a given range. That seems trivial, if the range minimum and maximum are known ahead. 
$inRange = $a <= $x && $x <= $b;

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But if you don't know which one is minimum and which one is maximum, the algorithm should be a bit more flexible. Here is where Perl's spaceship operator can help. I came up with: 

$inRange = (($a <=> $x) * ($b <=> $x)) < 1;

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where $a and $b are the unordered range limits and $x is the variable to be tested.

Could this be optimized (reduced) further? I would be interested to know.

Thanks, hexcoder

In reply to Range check with unordered limits by hexcoder

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